US5946611A - Cellular telephone system that uses position of a mobile unit to make call management decisions - Google Patents

Cellular telephone system that uses position of a mobile unit to make call management decisions Download PDF

Info

Publication number
US5946611A
US5946611A US08/670,281 US67028196A US5946611A US 5946611 A US5946611 A US 5946611A US 67028196 A US67028196 A US 67028196A US 5946611 A US5946611 A US 5946611A
Authority
US
United States
Prior art keywords
mobile unit
call
cell site
emergency service
cellular telephone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08/670,281
Inventor
Everett Dennison
Edwin L. Nass
Timothy J. Duffy
Gregory T. Pauley
Scott L. Jones
Deborah J. Shale
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EMSAT ADVANCED GEO-LOCATION TECHNOLOGY LLC
Sygnet Communications Inc
Original Assignee
Sycord LP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
US case filed in Ohio Northern District Court litigation Critical https://portal.unifiedpatents.com/litigation/Ohio%20Northern%20District%20Court/case/4%3A09-cv-02815 Source: District Court Jurisdiction: Ohio Northern District Court "Unified Patents Litigation Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License.
US case filed in Ohio Northern District Court litigation https://portal.unifiedpatents.com/litigation/Ohio%20Northern%20District%20Court/case/4%3A08-cv-00821 Source: District Court Jurisdiction: Ohio Northern District Court "Unified Patents Litigation Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License.
US case filed in Ohio Northern District Court litigation https://portal.unifiedpatents.com/litigation/Ohio%20Northern%20District%20Court/case/4%3A08-cv-00817 Source: District Court Jurisdiction: Ohio Northern District Court "Unified Patents Litigation Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License.
US case filed in Texas Eastern District Court litigation https://portal.unifiedpatents.com/litigation/Texas%20Eastern%20District%20Court/case/2%3A08-cv-00381 Source: District Court Jurisdiction: Texas Eastern District Court "Unified Patents Litigation Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License.
US case filed in Ohio Northern District Court litigation https://portal.unifiedpatents.com/litigation/Ohio%20Northern%20District%20Court/case/5%3A10-cv-00245 Source: District Court Jurisdiction: Ohio Northern District Court "Unified Patents Litigation Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License.
US case filed in Ohio Northern District Court litigation https://portal.unifiedpatents.com/litigation/Ohio%20Northern%20District%20Court/case/4%3A08-cv-00818 Source: District Court Jurisdiction: Ohio Northern District Court "Unified Patents Litigation Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License.
US case filed in Ohio Northern District Court litigation https://portal.unifiedpatents.com/litigation/Ohio%20Northern%20District%20Court/case/4%3A10-cv-02567 Source: District Court Jurisdiction: Ohio Northern District Court "Unified Patents Litigation Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License.
US case filed in Ohio Northern District Court litigation https://portal.unifiedpatents.com/litigation/Ohio%20Northern%20District%20Court/case/4%3A09-cv-02313 Source: District Court Jurisdiction: Ohio Northern District Court "Unified Patents Litigation Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License.
First worldwide family litigation filed litigation https://patents.darts-ip.com/?family=27369340&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US5946611(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
US case filed in Texas Eastern District Court litigation https://portal.unifiedpatents.com/litigation/Texas%20Eastern%20District%20Court/case/2%3A09-cv-00091 Source: District Court Jurisdiction: Texas Eastern District Court "Unified Patents Litigation Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License.
US case filed in Ohio Northern District Court litigation https://portal.unifiedpatents.com/litigation/Ohio%20Northern%20District%20Court/case/4%3A08-cv-00822 Source: District Court Jurisdiction: Ohio Northern District Court "Unified Patents Litigation Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License.
US case filed in West Virginia Northern District Court litigation https://portal.unifiedpatents.com/litigation/West%20Virginia%20Northern%20District%20Court/case/3%3A09-cv-00007 Source: District Court Jurisdiction: West Virginia Northern District Court "Unified Patents Litigation Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License.
US case filed in Ohio Northern District Court litigation https://portal.unifiedpatents.com/litigation/Ohio%20Northern%20District%20Court/case/4%3A08-cv-00816 Source: District Court Jurisdiction: Ohio Northern District Court "Unified Patents Litigation Data" by Unified Patents is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from US07/813,494 external-priority patent/US5235633A/en
Priority to US08/670,281 priority Critical patent/US5946611A/en
Application filed by Sycord LP filed Critical Sycord LP
Application granted granted Critical
Publication of US5946611A publication Critical patent/US5946611A/en
Assigned to SYCORD LIMITED PARTNERSHIP reassignment SYCORD LIMITED PARTNERSHIP CORRECTIVE ASSIGNMENT TO CORRECT PATENT NUMBERS 5946445 AND 6324611 AT REEL 13887 AND FRAME 859. Assignors: DENNISON, EVERETT, DUFFY, TIMOTHY J., JONES, SCOTT L., PAULEY, GREGORY T., SYGNET WIRELESS, INC. AND ITS WHOLLY OWNED SUBSIDIARY, SYGNET COMMUNICATIONS, INC.
Assigned to EMSAT ADVANCED GEO-LOCATION TECHNOLOGY, LLC reassignment EMSAT ADVANCED GEO-LOCATION TECHNOLOGY, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SYCORD LIMITED PARTNERSHIP (A/K/A SYCORD LP)
Assigned to SYGNET COMMUNICATIONS, INC. reassignment SYGNET COMMUNICATIONS, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DENNISON, EVERETT, DUFFY, TIMOTHY J., JONES, SCOTT L., PAULEY, GREGORY T., SHALE, DEBORAH J., NASS, EDWIN L.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/20Selecting an access point
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/0009Transmission of position information to remote stations
    • G01S5/0018Transmission from mobile station to base station
    • G01S5/0027Transmission from mobile station to base station of actual mobile position, i.e. position determined on mobile
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/185Space-based or airborne stations; Stations for satellite systems
    • H04B7/1853Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
    • H04B7/18539Arrangements for managing radio, resources, i.e. for establishing or releasing a connection
    • H04B7/18541Arrangements for managing radio, resources, i.e. for establishing or releasing a connection for handover of resources
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/185Space-based or airborne stations; Stations for satellite systems
    • H04B7/1853Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
    • H04B7/18545Arrangements for managing station mobility, i.e. for station registration or localisation
    • H04B7/18547Arrangements for managing station mobility, i.e. for station registration or localisation for geolocalisation of a station
    • H04B7/1855Arrangements for managing station mobility, i.e. for station registration or localisation for geolocalisation of a station using a telephonic control signal, e.g. propagation delay variation, Doppler frequency variation, power variation, beam identification
    • H04B7/18552Arrangements for managing station mobility, i.e. for station registration or localisation for geolocalisation of a station using a telephonic control signal, e.g. propagation delay variation, Doppler frequency variation, power variation, beam identification using a telephonic control signal and a second ranging satellite
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02Services making use of location information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W64/00Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S2205/00Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S2205/001Transmission of position information to remote stations
    • G01S2205/008Transmission of position information to remote stations using a mobile telephone network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/32Reselection being triggered by specific parameters by location or mobility data, e.g. speed data

Definitions

  • the present invention relates to the general art of cellular mobile radiotelephone (CMR) technology, and to the particular field of managing the calls in a cellular system.
  • CMR cellular mobile radiotelephone
  • the typical CMR system includes a multiplicity of cells, such as indicated in FIG. 1.
  • a particular geographic area is subdivided into a multiplicity of subareas, with each of the subareas being serviced by a stationary transmitter/receiver setup.
  • the cells are set up to carry signals to and from mobile units M in the range of the cell. If one cell becomes too crowded, it can be divided into smaller cells, by a process known as cell splitting.
  • any particular geographic area can become quite complicated with cells overlapping each other, and overlapping cells of other neighboring cellular systems.
  • cellular is intended to be a term of convenience, and is not intended to be limiting.
  • the present disclosure is intended to encompass any communication system in which an overall area can be divided into one or more subareas such as shown in FIG. 1.
  • FIGS. 2 through 7 A typical CMR set up is indicated in FIGS. 2 through 7, and will be described so an understanding of the problem to which this invention is directed can be obtained.
  • FIGS. 2, 3 and 4 show a typical cellular telephone unit 2 having a unique mobile identification number stored in a suitable location such as an electrically erasable programmable read-only memory (not shown). Telephone units of this kind are known to those skilled in this art, and thus will not be described in detail.
  • the telephone unit 2 includes a handset 4 having a keypad 5 as well as a speaker 6 and a microphone 7.
  • a transceiver 8 ordinarily built into the telephone unit 2, exchanges signals via an antenna 10 with a mobile telecommunications switching office or MTSO 12 via a cell site 14.
  • a duplexer 15 connects the antenna to the transceiver.
  • the cell site 14 includes an antenna 16 connected to a control terminal 17 via a transceiver 18.
  • the cell 14 is connected to the MTSO via a transmission link 20.
  • the mobile unit M moves about the geographic areas covered by the various cells as indicated in FIG. 1. As that mobile unit moves about, it decodes the overhead message control signals generated by various cell site control channels. The mobile unit locks onto the cell site that is emitting the strongest signal. The mobile unit rescans channels periodically to update its status. If, for example, a fixed-position land-based telephone T is used to call the mobile unit, a signal is sent via landlines L, to the central office CO of a public/switched telephone system (PTSN) 12A. This system then utilizes the switching network SN associated therewith to call the MTSO 12 via a transmission link L1.
  • PTSN public/switched telephone system
  • the MTSO then utilizes its own switching network and generates a page request signal to all cell sites via transmission links, such as the transmission link 20.
  • the cell site which has been notified of the presence of the mobile unit M sends a signal back to the MTSO via the landlines alerting the MTSO of the presence of the mobile unit.
  • the MTSO then orders the mobile unit, via the notifying cell site, to tune to an assigned channel and receive the call. Billing and other business information are recorded in the MTSO at this time.
  • the mobile unit rescans the control channels to determine which is the best server based on signal strength. Upon selecting the best server, the mobile unit transmits call site information on the control channel receive frequency and then receives a voice channel to tune to if the mobile unit is authorized to place a call.
  • the MTSO has a signal strength table ST, and signal strength from the mobile unit is constantly compared to acceptable signal strength levels in the table. Such a table can be located in each cell site if desired.
  • the MTSO Should signal strength diminish below a preset range, the MTSO generates a "locate request" signal to all cell sites that neighbor the original cell site. Each of such neighboring cell sites receiving a signal from the mobile unit signals the MTSO, and the signal strength from such neighboring cell sites are checked against the signal strength table. The MTSO makes a decision as to which cell site should control the call, and notifies the original cell site to order the mobile unit to retune to a voice channel of the new cell site.
  • the mobile unit completes the call via the new cell site channel. This transfer of control is known as a handoff.
  • a mobile unit may use a cell that is located far from the mobile unit rather than a cell located immediately adjacent to that mobile unit.
  • Hilly terrain is a common example of this problem. While this may not be a technical problem, it is important because a cellular company cannot assess long distance charges and/or message units to the calls. This deprives the cellular company of income that it could otherwise receive and customers of optimum service. Communities are also deprived of tax income that might be assessed against such calls as well.
  • a cellular system that can provide consistently high quality service, yet can do so with a minimum number of cell sites in a particular geographic area. Still further, there is a need for a cellular system that can accurately assess charges for all CMR services including message units for calls covering a certain distance within the geographic area.
  • GPS Global Positioning System
  • LORAN LO Radio Access
  • the NAVSTAR global positioning system, or GPS is a system employing ultimately eighteen satellites in twelve hour orbits of 55° inclination. The system is being implemented by the Department of Defense for military use. However, it has a "clear access" (C/A) channel that is available for general civil use.
  • the GPS is a passive navigation system on the part of the user, in that only reception of satellite-transmitted signals is required by the user to compute position.
  • the GPS provides a capability for continuous position determination, and a position can be computed on the order of every second of time, and thus provides a capability of determining the position of a highly mobile vehicle.
  • a full discussion of the GPS is presented in textbooks, such as "Handbook of Modern Electronics and Electrical Engineering,” edited by Charles Belove and published in 1986 by Wiley-Interscience (see chapter 54 thereof, the disclosure of which is incorporated herein by reference), and includes a satellite positioned in a geostationary orbit and communicating with ground-based receivers. Based on the signals received from the satellite, the exact position in longitude and latitude, of the ground-based receiver can be determined with an extremely high degree of accuracy and precision.
  • the exact longitude and latitude of the mobile unit is then communicated to the MTSO, and the cell site that services that particular position is signalled by the MTSO to carry the call associated with the mobile unit.
  • the position of the mobile unit is constantly updated, and call management decisions, such as handoffs, can be made based on the location of the mobile unit rather than the strength of the signal associated with that unit.
  • the MTSO has a look-up table in its data storage facilities that compares positional data from the mobile units to data associated with cell site coverage areas. Based on a look up in this table, the MTSO can select the cell site most appropriate to a call.
  • call management decisions are made based on position of the mobile unit, the number of cell sites can be reduced as communication is not subject to vagaries of weather or the like to the degree that call management decisions based on signal strength are. Even with the reduced number of cell sites, the quality of calls using such a system is improved due to proper handoff.
  • the system is quite flexible, and cell site placement and frequency reuse are extremely efficient since call management is much more precise than in systems that use signal strength to make call management decisions.
  • the cellular system of the present invention in which call management decisions are made based on position of the mobile unit can reduce or eliminate the provision of cellular service beyond the authorized area, in effect reducing the interference to and from neighboring cellular carriers (reduction of inter-system interference) and more precisely define the inter-system service boundaries and handoff parameters.
  • This system also permits precise definition of service boundaries for individual cell sites thereby allowing for greater system control and the reduction of intra-system interference.
  • accurate and detailed cell site usage and traffic pattern data can be developed in the present system, thereby enabling accurate and precise control of system growth.
  • the present cellular system can also be real-time tailored based on current cellular use.
  • FIG. 1 illustrates a geographic area divided into a multiplicity of cells.
  • FIG. 2 illustrates a typical prior art mobile cellular telephone and its link with a fixed cell site and an MTSO.
  • FIG. 3 illustrates the mobile unit of the cellular telephone system shown in FIG. 2.
  • FIG. 4 illustrates a typical prior art cellular system in which a mobile unit can be connected with a fixed-position unit.
  • FIG. 4A is a block diagram showing systems included in the MTSO shown in FIG. 4.
  • FIG. 5 is a flow diagram of a call originated by the PTSN (public service telephone network) and a mobile unit using a prior art cellular system.
  • PTSN public service telephone network
  • FIG. 6 is a block diagram of a mobile unit of a cellular telephone system which incorporates a GPS location determining system embodying the present invention.
  • FIG. 7 illustrates a cellular system incorporating a GPS position locating system for a mobile unit communicating with other units, such as the fixed-position unit shown.
  • FIG. 7A is a block diagram showing systems included in the MTSO shown in FIG. 7.
  • FIG. 8 is a block diagram illustrating the cellular system embodying the present invention.
  • FIG. 9 illustrates a look-up table that is incorporated into the MTSO of the present invention to make call management decisions based on the location of a mobile unit.
  • FIG. 10 is a block diagram illustrating a landline-to-mobile unit call in which position data are exchanged between the mobile unit and the MTSO.
  • FIGS. 11A and 11B comprise a flow chart illustrating a call sequence between a mobile unit and another unit in which switching decisions are made based on the position of the mobile unit rather than the strength of the signal associated with the mobile unit.
  • FIGS. 6, 7 and 7A Shown in FIGS. 6, 7 and 7A is a cellular system 20 embodying the present invention.
  • the cellular system 20 uses positional data associated with the mobile unit M' to make call management decisions.
  • the cellular system 20 while similar in all other respects to the cellular system illustrated in FIGS. 2 and 3, includes means for accurately and precisely determining the exact position of the mobile unit M', and then further includes means for using this positional information to determine which cell site is best suited to handle a call associated with that mobile unit M'.
  • the means for accurately determining the precise position of the mobile unit includes a Global Positioning System.
  • the GPS includes satellites, such as satellite 22 in geostationary orbit about the earth.
  • Each mobile unit further includes a GPS receiver 24 located between the duplexer and the logic circuitry 25 of the mobile unit.
  • the GPS receiver communicates with the satellite 22 and the exact longitude and latitude of the mobile unit are determined. This information is sent to the MTSO via a cell site, and the MTSO uses a look-up table such as disclosed in FIG. 9, containing the geographic location of each cell site in the cellular system, to determine which cell site is most appropriate for use by the mobile unit.
  • the mobile unit communicates with cell sites using unused bits of the aforediscussed overhead messages to send its positional information to the MTSO when the mobile unit is first activated. This positional information is relayed to the MTSO by the first cell site to communicate with the mobile unit. The MTSO then selects the cell site most appropriate for the mobile unit and hands that mobile unit off to that cell site.
  • the cell sites transmit system service boundaries in their overhead messages that are interpreted by mobile units.
  • the mobile units use the location information supplied by the GPS receiver as opposed to signal strength to determine which system to originate on. Call termination can utilize the paging process as is currently utilized.
  • a response from a mobile unit includes the location information, and the designated control channel instructs the mobile unit to tune to one of its channels.
  • a call in progress utilizes the overhead message of the voice channel to communicate location information. Once a mobile unit that is call processing on a particular site crosses a cell boundary, it is instructed to perform a handoff to the cell that is to service the new location.
  • the GPS is used as an example of the preferred source of positional data; however, other sources similar to the GPS can be used without departing from the scope of the present invention. All that is required is that the source of positional data be able to generate precise and accurate locational data on a fixed or a rapidly moving object. It is also helpful, but not absolutely required, that the CMR be only passively involved in the determination of the positional data.
  • the handoff process is similar to the present handoff processes, except it will be controlled according to position of the mobile unit instead of signal strength. This position information is used to determine call rating and taxing for billing purposes and call routing to make sure that the proper services for that location are provided.
  • a "locate request" signal is not used, since the exact location of the mobile unit is known to the MTSO. However, as indicated in FIG. 8, a signal strength method can also be used in making call management decisions if suitable. Such a process would be used if the mobile unit moves into a prior art cellular system.
  • FIG. 11 A call using the cellular system of the present invention is illustrated in FIG. 11.
  • Initial communication between a mobile unit and the MTSO is established using the overhead communication network described above.
  • the mobile unit scans marker channels and initially locks onto the cell site that has the strongest signal. This cell site may not be the most appropriate cell site for use by that mobile unit, but it serves as an entre into the system.
  • the mobile unit uses the GPS receiver 24 and GPS satellite 22 and to determine its exact geographic coordinates, such as longitude and latitude. This information is then relayed to the MTSO using the originating cell site.
  • the MTSO uses this information in conjunction with a look-up table such as shown in FIG. 9 to establish communication between the mobile unit and the cell site most appropriate to that mobile unit.
  • the mobile unit is then handed off to that cell site.
  • a call initiated by that mobile unit is routed through the appropriate cell site.
  • the MTSO can include a software system in the memory 30 shown in FIG. 8 to use the position controlled system, but to also test signal strength, and to use a signal strength controlled system if a signal still falls below a predetermined value when making call management decisions based on the position of the mobile unit. In this manner, the best of both systems can be obtained.
  • the system of the present invention can also be used to allow a mobile to place calls only on its home system at the decision of the mobile.
  • the mobile locating features of the system could also be important in other contexts, such as emergencies or the like.

Abstract

A cellular telephone system includes a plurality of cell sites and a mobile telephone switching office. Call management, including selection of a cell site most appropriate for a call associated with a mobile unit, are made based on the geographic location of the mobile unit as opposed to the strength of the signal associated with the call. The geographic location of the mobile unit is precisely determined using a NAVSTAR global positioning system, or its equivalent. Each mobile unit includes a GPS receiver that receives information from a geostationary satellite to determine the precise location of the mobile unit. This position information is relayed to the cell site initially managing the mobile unit, and the mobile unit is handed off to a cell site that is most appropriate for the call. Initial selection of an entrance cell site is made based on signal strength, but further call management decisions are made based on location of the mobile unit.

Description

"This is divisional of copending application Ser. No. 08/555,884filed on Oct. 23, 1995 now U.S. Pat. No. 5,546,445 which was a continuation of application Ser. No. 08/402,976 filed on Mar. 13, 1995 abandoned, which was a continuation-in-part of Ser. No. 08/057,833, filed on May 07,1993 and is now abandoned, which was a continuation-in-part of Ser. No. 07/813,494, filed on Dec. 26, 1991, and which is now U.S. Pat. No. 5,235,633."
TECHNICAL FIELD OF THE INVENTION
The present invention relates to the general art of cellular mobile radiotelephone (CMR) technology, and to the particular field of managing the calls in a cellular system.
BACKGROUND OF THE INVENTION
CMR is a rapidly growing telecommunications system. The typical CMR system includes a multiplicity of cells, such as indicated in FIG. 1. A particular geographic area is subdivided into a multiplicity of subareas, with each of the subareas being serviced by a stationary transmitter/receiver setup. The cells are set up to carry signals to and from mobile units M in the range of the cell. If one cell becomes too crowded, it can be divided into smaller cells, by a process known as cell splitting. As can be seen from FIG. 1, any particular geographic area can become quite complicated with cells overlapping each other, and overlapping cells of other neighboring cellular systems. It is noted that the term "cellular" is intended to be a term of convenience, and is not intended to be limiting. The present disclosure is intended to encompass any communication system in which an overall area can be divided into one or more subareas such as shown in FIG. 1.
A typical CMR set up is indicated in FIGS. 2 through 7, and will be described so an understanding of the problem to which this invention is directed can be obtained.
FIGS. 2, 3 and 4 show a typical cellular telephone unit 2 having a unique mobile identification number stored in a suitable location such as an electrically erasable programmable read-only memory (not shown). Telephone units of this kind are known to those skilled in this art, and thus will not be described in detail.
The telephone unit 2 includes a handset 4 having a keypad 5 as well as a speaker 6 and a microphone 7. A transceiver 8, ordinarily built into the telephone unit 2, exchanges signals via an antenna 10 with a mobile telecommunications switching office or MTSO 12 via a cell site 14. A duplexer 15 connects the antenna to the transceiver. The cell site 14 includes an antenna 16 connected to a control terminal 17 via a transceiver 18. The cell 14 is connected to the MTSO via a transmission link 20.
Referring to FIGS. 4A and 5, the operation of the CMR can be understood. The mobile unit M moves about the geographic areas covered by the various cells as indicated in FIG. 1. As that mobile unit moves about, it decodes the overhead message control signals generated by various cell site control channels. The mobile unit locks onto the cell site that is emitting the strongest signal. The mobile unit rescans channels periodically to update its status. If, for example, a fixed-position land-based telephone T is used to call the mobile unit, a signal is sent via landlines L, to the central office CO of a public/switched telephone system (PTSN) 12A. This system then utilizes the switching network SN associated therewith to call the MTSO 12 via a transmission link L1. The MTSO then utilizes its own switching network and generates a page request signal to all cell sites via transmission links, such as the transmission link 20. The cell site which has been notified of the presence of the mobile unit M sends a signal back to the MTSO via the landlines alerting the MTSO of the presence of the mobile unit. The MTSO then orders the mobile unit, via the notifying cell site, to tune to an assigned channel and receive the call. Billing and other business information are recorded in the MTSO at this time.
On the other hand, during call origination, the mobile unit rescans the control channels to determine which is the best server based on signal strength. Upon selecting the best server, the mobile unit transmits call site information on the control channel receive frequency and then receives a voice channel to tune to if the mobile unit is authorized to place a call.
As the mobile unit moves, the signal strength between that mobile unit and the originating cell site changes, and perhaps diminishes. Since signal strength is an inverse function of the square of the distance between the mobile unit and the cell site, signal strength can change rapidly and drastically as the mobile unit moves with respect to the cell site and therefore must be monitored closely. Moreover, signal strength can be strongly affected by terrain, environmental conditions as well as interference from other sources. The MTSO has a signal strength table ST, and signal strength from the mobile unit is constantly compared to acceptable signal strength levels in the table. Such a table can be located in each cell site if desired.
Should signal strength diminish below a preset range, the MTSO generates a "locate request" signal to all cell sites that neighbor the original cell site. Each of such neighboring cell sites receiving a signal from the mobile unit signals the MTSO, and the signal strength from such neighboring cell sites are checked against the signal strength table. The MTSO makes a decision as to which cell site should control the call, and notifies the original cell site to order the mobile unit to retune to a voice channel of the new cell site.
As soon as the mobile unit retunes, the mobile unit completes the call via the new cell site channel. This transfer of control is known as a handoff.
While this method of making switching decisions has worked well in the past, the growth and sophistication of the cellular industry has resulted in severe drawbacks to this method. First, due to uneven terrain, unpredictable environmental conditions, interference and the like, many cellular companies have been required to construct numerous cell sites. These cells often overlap neighboring cell sites and provide redundant coverage. This is extremely expensive, not only from the standpoint of construction costs, but due to monitoring and staffing costs as well. Even at this, conditions can change so rapidly that coverage may still be inconsistent.
Still further, due to idiosyncrasies in terrain and environment, a mobile unit may use a cell that is located far from the mobile unit rather than a cell located immediately adjacent to that mobile unit. Hilly terrain is a common example of this problem. While this may not be a technical problem, it is important because a cellular company cannot assess long distance charges and/or message units to the calls. This deprives the cellular company of income that it could otherwise receive and customers of optimum service. Communities are also deprived of tax income that might be assessed against such calls as well.
Still further, since only signal strength is used to make switching decisions, the location of a caller is not ascertainable. This could be important in keeping track of calls.
Other problems that have been experienced in such cellular systems include the inability to completely control the cell site transmit signal, crosstalk noise interference, dropped calls, overlap and an inability to adequately service areas with undulating terrain without infringing the borders of other cellular territories.
Therefore, there is a need for a cellular system that can provide consistently high quality service, yet can do so with a minimum number of cell sites in a particular geographic area. Still further, there is a need for a cellular system that can accurately assess charges for all CMR services including message units for calls covering a certain distance within the geographic area.
OBJECTS OF THE INVENTION
It is a main object of the present invention to provide a cellular system that can provide high quality service using only a minimum number of cell sites within a given geographic area.
It is another object of the present invention to provide a cellular system that can accurately track a mobile unit within the geographic area covered by the cellular system.
It is another object of the present invention to provide a cellular system that can assess charges for calls based on the geographic location of the call.
SUMMARY OF THE INVENTION
These, and other, objects are achieved by a cellular system that makes switching and call management decisions based on the location of a mobile unit rather than on the strength of the signal associated with that mobile unit. The exact location of each mobile unit is determined using a Global Positioning System (GPS), LORAN, or other position determining system. The NAVSTAR global positioning system, or GPS, is a system employing ultimately eighteen satellites in twelve hour orbits of 55° inclination. The system is being implemented by the Department of Defense for military use. However, it has a "clear access" (C/A) channel that is available for general civil use. The GPS is a passive navigation system on the part of the user, in that only reception of satellite-transmitted signals is required by the user to compute position. The GPS provides a capability for continuous position determination, and a position can be computed on the order of every second of time, and thus provides a capability of determining the position of a highly mobile vehicle. A full discussion of the GPS is presented in textbooks, such as "Handbook of Modern Electronics and Electrical Engineering," edited by Charles Belove and published in 1986 by Wiley-Interscience (see chapter 54 thereof, the disclosure of which is incorporated herein by reference), and includes a satellite positioned in a geostationary orbit and communicating with ground-based receivers. Based on the signals received from the satellite, the exact position in longitude and latitude, of the ground-based receiver can be determined with an extremely high degree of accuracy and precision.
The exact longitude and latitude of the mobile unit is then communicated to the MTSO, and the cell site that services that particular position is signalled by the MTSO to carry the call associated with the mobile unit. The position of the mobile unit is constantly updated, and call management decisions, such as handoffs, can be made based on the location of the mobile unit rather than the strength of the signal associated with that unit. The MTSO has a look-up table in its data storage facilities that compares positional data from the mobile units to data associated with cell site coverage areas. Based on a look up in this table, the MTSO can select the cell site most appropriate to a call.
Since the position of the mobile unit is known to the MTSO, the assessment of message units, taxes, and other charges can be made. The billing will be more consistent than is possible with present systems. Of course, call routing will be greatly improved in the system of the present invention as compared to prior systems.
Still further, since call management decisions are made based on position of the mobile unit, the number of cell sites can be reduced as communication is not subject to vagaries of weather or the like to the degree that call management decisions based on signal strength are. Even with the reduced number of cell sites, the quality of calls using such a system is improved due to proper handoff. The system is quite flexible, and cell site placement and frequency reuse are extremely efficient since call management is much more precise than in systems that use signal strength to make call management decisions.
The cellular system of the present invention in which call management decisions are made based on position of the mobile unit can reduce or eliminate the provision of cellular service beyond the authorized area, in effect reducing the interference to and from neighboring cellular carriers (reduction of inter-system interference) and more precisely define the inter-system service boundaries and handoff parameters. This system also permits precise definition of service boundaries for individual cell sites thereby allowing for greater system control and the reduction of intra-system interference. Still further, accurate and detailed cell site usage and traffic pattern data can be developed in the present system, thereby enabling accurate and precise control of system growth. The present cellular system can also be real-time tailored based on current cellular use.
BRIEF DESCRIPTION OF THE DRAWING FIGURES
FIG. 1 illustrates a geographic area divided into a multiplicity of cells.
FIG. 2 illustrates a typical prior art mobile cellular telephone and its link with a fixed cell site and an MTSO.
FIG. 3 illustrates the mobile unit of the cellular telephone system shown in FIG. 2.
FIG. 4 illustrates a typical prior art cellular system in which a mobile unit can be connected with a fixed-position unit.
FIG. 4A is a block diagram showing systems included in the MTSO shown in FIG. 4.
FIG. 5 is a flow diagram of a call originated by the PTSN (public service telephone network) and a mobile unit using a prior art cellular system.
FIG. 6 is a block diagram of a mobile unit of a cellular telephone system which incorporates a GPS location determining system embodying the present invention.
FIG. 7 illustrates a cellular system incorporating a GPS position locating system for a mobile unit communicating with other units, such as the fixed-position unit shown.
FIG. 7A is a block diagram showing systems included in the MTSO shown in FIG. 7.
FIG. 8 is a block diagram illustrating the cellular system embodying the present invention.
FIG. 9 illustrates a look-up table that is incorporated into the MTSO of the present invention to make call management decisions based on the location of a mobile unit.
FIG. 10 is a block diagram illustrating a landline-to-mobile unit call in which position data are exchanged between the mobile unit and the MTSO.
FIGS. 11A and 11B comprise a flow chart illustrating a call sequence between a mobile unit and another unit in which switching decisions are made based on the position of the mobile unit rather than the strength of the signal associated with the mobile unit.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT OF THE INVENTION
Shown in FIGS. 6, 7 and 7A is a cellular system 20 embodying the present invention. The cellular system 20 uses positional data associated with the mobile unit M' to make call management decisions. To this end, the cellular system 20, while similar in all other respects to the cellular system illustrated in FIGS. 2 and 3, includes means for accurately and precisely determining the exact position of the mobile unit M', and then further includes means for using this positional information to determine which cell site is best suited to handle a call associated with that mobile unit M'.
The means for accurately determining the precise position of the mobile unit includes a Global Positioning System. The GPS includes satellites, such as satellite 22 in geostationary orbit about the earth. Each mobile unit further includes a GPS receiver 24 located between the duplexer and the logic circuitry 25 of the mobile unit. The GPS receiver communicates with the satellite 22 and the exact longitude and latitude of the mobile unit are determined. This information is sent to the MTSO via a cell site, and the MTSO uses a look-up table such as disclosed in FIG. 9, containing the geographic location of each cell site in the cellular system, to determine which cell site is most appropriate for use by the mobile unit. The mobile unit communicates with cell sites using unused bits of the aforediscussed overhead messages to send its positional information to the MTSO when the mobile unit is first activated. This positional information is relayed to the MTSO by the first cell site to communicate with the mobile unit. The MTSO then selects the cell site most appropriate for the mobile unit and hands that mobile unit off to that cell site. The cell sites transmit system service boundaries in their overhead messages that are interpreted by mobile units. The mobile units use the location information supplied by the GPS receiver as opposed to signal strength to determine which system to originate on. Call termination can utilize the paging process as is currently utilized. A response from a mobile unit includes the location information, and the designated control channel instructs the mobile unit to tune to one of its channels. A call in progress utilizes the overhead message of the voice channel to communicate location information. Once a mobile unit that is call processing on a particular site crosses a cell boundary, it is instructed to perform a handoff to the cell that is to service the new location. It is understood that the GPS is used as an example of the preferred source of positional data; however, other sources similar to the GPS can be used without departing from the scope of the present invention. All that is required is that the source of positional data be able to generate precise and accurate locational data on a fixed or a rapidly moving object. It is also helpful, but not absolutely required, that the CMR be only passively involved in the determination of the positional data.
The handoff process is similar to the present handoff processes, except it will be controlled according to position of the mobile unit instead of signal strength. This position information is used to determine call rating and taxing for billing purposes and call routing to make sure that the proper services for that location are provided.
A "locate request" signal is not used, since the exact location of the mobile unit is known to the MTSO. However, as indicated in FIG. 8, a signal strength method can also be used in making call management decisions if suitable. Such a process would be used if the mobile unit moves into a prior art cellular system.
A call using the cellular system of the present invention is illustrated in FIG. 11. Initial communication between a mobile unit and the MTSO is established using the overhead communication network described above. The mobile unit scans marker channels and initially locks onto the cell site that has the strongest signal. This cell site may not be the most appropriate cell site for use by that mobile unit, but it serves as an entre into the system. Once this initial communication is established, the mobile unit uses the GPS receiver 24 and GPS satellite 22 and to determine its exact geographic coordinates, such as longitude and latitude. This information is then relayed to the MTSO using the originating cell site. The MTSO uses this information in conjunction with a look-up table such as shown in FIG. 9 to establish communication between the mobile unit and the cell site most appropriate to that mobile unit. The mobile unit is then handed off to that cell site. A call initiated by that mobile unit is routed through the appropriate cell site.
As indicated in FIG. 11, business information associated with the call, can be recorded at the MTSO. As indicated in FIG. 10, the dotted lines represent data transmission that contains GPS information. It is also noted that since both a position controlled system and a signal strength system are included in the cellular system of the present invention, the MTSO can include a software system in the memory 30 shown in FIG. 8 to use the position controlled system, but to also test signal strength, and to use a signal strength controlled system if a signal still falls below a predetermined value when making call management decisions based on the position of the mobile unit. In this manner, the best of both systems can be obtained.
The system of the present invention can also be used to allow a mobile to place calls only on its home system at the decision of the mobile. The mobile locating features of the system could also be important in other contexts, such as emergencies or the like.
It is understood that while certain forms of the present invention have been illustrated and described herein, it is not to be limited to the specific forms or arrangements of parts described and shown.

Claims (5)

We claim:
1. A method of making emergency call decisions in a cellular telephone system having a plurality of cell sites at various geographic locations comprising:
A) providing a mobile unit which can be located at various and changeable geographic locations;
B) using the mobile unit to place a call requesting emergency service via a cellular telephone system;
C) determining the exact geographic location of the mobile unit placing the call requesting emergency service;
D) storing geographic data associated with the cellular telephone system and which are required to complete the call requesting emergency service;
E) comparing the exact geographic location of the mobile unit placing the call requesting emergency service to the stored geographic data; and
F) automatically routing the mobile unit call requesting emergency service to an emergency service based on the comparison regardless of cell site location.
2. The method defined in claim 1 wherein the step of determining the exact geographic location of the mobile unit includes using over-the-air communications.
3. The method defined in claim 1 wherein the step of storing geographic data associated with the cellular telephone system includes placing those geographic data on a look-up table.
4. The method defined in claim 3 wherein the step of comparing the exact geographic location of the mobile unit placing the call requesting emergency service to the stored geographic data includes using the look-up table for said comparing step.
5. The method defined in claim 1 further including a step of communicating the exact geographic location of the mobile unit placing the call requesting emergency service to the emergency service.
US08/670,281 1991-12-26 1996-06-21 Cellular telephone system that uses position of a mobile unit to make call management decisions Expired - Lifetime US5946611A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US08/670,281 US5946611A (en) 1991-12-26 1996-06-21 Cellular telephone system that uses position of a mobile unit to make call management decisions

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US07/813,494 US5235633A (en) 1991-12-26 1991-12-26 Cellular telephone system that uses position of a mobile unit to make call management decisions
US5783393A 1993-05-07 1993-05-07
US40297695A 1995-03-13 1995-03-13
US08/555,884 US5546445A (en) 1991-12-26 1995-10-23 Cellular telephone system that uses position of a mobile unit to make call management decisions
US08/670,281 US5946611A (en) 1991-12-26 1996-06-21 Cellular telephone system that uses position of a mobile unit to make call management decisions

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US08/555,884 Division US5546445A (en) 1991-12-26 1995-10-23 Cellular telephone system that uses position of a mobile unit to make call management decisions

Publications (1)

Publication Number Publication Date
US5946611A true US5946611A (en) 1999-08-31

Family

ID=27369340

Family Applications (2)

Application Number Title Priority Date Filing Date
US08/555,884 Expired - Lifetime US5546445A (en) 1991-12-26 1995-10-23 Cellular telephone system that uses position of a mobile unit to make call management decisions
US08/670,281 Expired - Lifetime US5946611A (en) 1991-12-26 1996-06-21 Cellular telephone system that uses position of a mobile unit to make call management decisions

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US08/555,884 Expired - Lifetime US5546445A (en) 1991-12-26 1995-10-23 Cellular telephone system that uses position of a mobile unit to make call management decisions

Country Status (1)

Country Link
US (2) US5546445A (en)

Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6167274A (en) * 1997-06-03 2000-12-26 At&T Wireless Svcs. Inc. Method for locating a mobile station
US6198931B1 (en) * 1999-07-28 2001-03-06 Motorola, Inc. Method for prioritizing a communication in a wireless communication system
US6249679B1 (en) * 1997-09-30 2001-06-19 U.S. Philips Corporation Telecommunications system, location method and mobile station for such a system
US6282417B1 (en) * 1998-05-08 2001-08-28 David K. Ward Communication radio method and apparatus
US20010024957A1 (en) * 1995-12-27 2001-09-27 Sony Corporation Terminal unit, position display method, information providing system, and information providing method
WO2002013562A1 (en) * 2000-08-04 2002-02-14 Siemens Aktiengesellschaft Position-dependent control of features of a communications system
US6374113B1 (en) * 1998-09-29 2002-04-16 Avaya Technology Corp. Dynamic call coverage paths based on terminal location
US20020093924A1 (en) * 1997-05-19 2002-07-18 Integrated Data Communications, Inc. In-band signaling for data communications over digital wireless telecommunications networks
DE10103272A1 (en) * 2001-01-25 2002-08-01 Gap Ag Gsm Applikationen Und P Mobile location device has hybrid radio module that can transmit radio signals according to at least two different transmission standards acceptable to a mobile radio fixed system
US6445912B1 (en) 1999-06-23 2002-09-03 At&T Wireless Services, Inc. System and method for checking service availability
US6484033B2 (en) 2000-12-04 2002-11-19 Motorola, Inc. Wireless communication system for location based schedule management and method therefor
US20020172193A1 (en) * 1997-05-19 2002-11-21 Preston Dan A. In-band signaling for data communications over digital wireless telecommunications networks
US20030083080A1 (en) * 2001-11-01 2003-05-01 Airbiquity Inc. Facility and method for wireless transmission of data
US20030139183A1 (en) * 2002-01-11 2003-07-24 Nokia Corporation Method and apparatus for reducing premature termination of mobile station LCS procedure during RR operations
US6654362B1 (en) 1999-11-24 2003-11-25 Lucent Technologies, Inc. Use of location in handoff in wireless communication systems
US6665534B1 (en) * 1999-10-18 2003-12-16 Avaya Inc. Priority incoming call alerting system for a wireless communication system
US6681121B1 (en) 2000-03-21 2004-01-20 Airbiquity Inc. Circuitry for activating a modem in a cellular telephone
US6768909B1 (en) * 2000-02-18 2004-07-27 Ericsson, Inc. Handoff between external and internal positioning systems
US6791959B1 (en) * 1999-04-12 2004-09-14 Broadcom Corporation Method for determining when a communication device should rate shift or roam in a wireless environment
US6799046B1 (en) * 1998-06-10 2004-09-28 Nortel Networks Limited Method and system for locating a mobile telephone within a mobile telephone communication network
US20050020242A1 (en) * 1999-07-29 2005-01-27 Bryan Holland Locator system
US20060234727A1 (en) * 2005-04-13 2006-10-19 Wirelesswerx International, Inc. Method and System for Initiating and Handling an Emergency Call
US20060234726A1 (en) * 2005-04-13 2006-10-19 Wirelesswerx International, Inc. Method and System for Initiating and Handling an Emergency Call Utilizing Geographical Zones
US20060233318A1 (en) * 2005-04-13 2006-10-19 Wirelesswerx International, Inc. Method and System for Providing Location Updates
US20060240411A1 (en) * 2005-04-20 2006-10-26 Becton, Dickinson And Company Multiplex microparticle system
US7349705B1 (en) 1999-07-29 2008-03-25 Bryan Holland Wireless remote location system and method
US20080176539A1 (en) * 2004-11-05 2008-07-24 Wirelesswerx International, Inc. Method and system to control movable entities
US20080182606A1 (en) * 2007-01-31 2008-07-31 Trapeze Software Inc. System and method of communications
US20080195306A1 (en) * 2005-06-15 2008-08-14 Airbiquity Inc. Remote destination programming for vehicle navigation
US20090132163A1 (en) * 2007-08-30 2009-05-21 Wirelesswerx International, Inc. Configuring and using multi-dimensional zones
US20090138336A1 (en) * 2007-08-30 2009-05-28 Wirelesswerx International, Inc. Messaging in a multi-dimensional space
US20090137255A1 (en) * 2007-08-30 2009-05-28 Wirelesswerx International, Inc. Mapping in a multi-dimensional space
US20100130232A1 (en) * 2008-11-24 2010-05-27 International Business Machines Corporation Location Based Services with Multiple Transmission Methods
US7733853B2 (en) 2005-01-31 2010-06-08 Airbiquity, Inc. Voice channel control of wireless packet data communications
US20100222052A1 (en) * 2005-05-17 2010-09-02 At&T Intellectual Property Ii, L.P. Method and Apparatus for Routing a Call to a Dual Mode Wireless Device
US20100273470A1 (en) * 2009-04-27 2010-10-28 Airbiquity Inc. Automatic gain control in a personal navigation device
US7924934B2 (en) 2006-04-07 2011-04-12 Airbiquity, Inc. Time diversity voice channel data communications
US20110145273A1 (en) * 2009-12-16 2011-06-16 Verizon Patent And Licensing, Inc. Verifying network delivery of information to a device based on physical characteristics
US7979095B2 (en) 2007-10-20 2011-07-12 Airbiquity, Inc. Wireless in-band signaling with in-vehicle systems
US7983310B2 (en) 2008-09-15 2011-07-19 Airbiquity Inc. Methods for in-band signaling through enhanced variable-rate codecs
US8060109B2 (en) 1997-08-04 2011-11-15 Enovsys Llc Authorized location reporting mobile communication system
US8200186B2 (en) 2007-08-30 2012-06-12 Wirelesswerx International, Inc. Emergency control in a multi-dimensional space
US8249865B2 (en) 2009-11-23 2012-08-21 Airbiquity Inc. Adaptive data transmission for a digital in-band modem operating over a voice channel
US8290515B2 (en) 2004-11-05 2012-10-16 Wirelesswerx International, Inc. Method and system to monitor and control devices utilizing wireless media
US8369866B2 (en) 2004-11-05 2013-02-05 Wirelesswerx International, Inc. Method and system for providing area specific messaging
US8418039B2 (en) 2009-08-03 2013-04-09 Airbiquity Inc. Efficient error correction scheme for data transmission in a wireless in-band signaling system
US8483655B2 (en) * 2007-06-08 2013-07-09 Research In Motion Limited Methods and apparatus for use in processing disconnected emergency calls and other communications involving mobile communication devices and the remote monitoring thereof
US8594138B2 (en) 2008-09-15 2013-11-26 Airbiquity Inc. Methods for in-band signaling through enhanced variable-rate codecs
US8612278B1 (en) 2013-03-06 2013-12-17 Wirelesswerx International, Inc. Controlling queuing in a defined location
US8848825B2 (en) 2011-09-22 2014-09-30 Airbiquity Inc. Echo cancellation in wireless inband signaling modem

Families Citing this family (189)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8352400B2 (en) 1991-12-23 2013-01-08 Hoffberg Steven M Adaptive pattern recognition based controller apparatus and method and human-factored interface therefore
US10361802B1 (en) 1999-02-01 2019-07-23 Blanding Hovenweep, Llc Adaptive pattern recognition based control system and method
US6324404B1 (en) * 1991-12-26 2001-11-27 Sycord Limited Partnership Cellular telephone system that uses position of a mobile unit to make call management decisions
US5235633A (en) * 1991-12-26 1993-08-10 Everett Dennison Cellular telephone system that uses position of a mobile unit to make call management decisions
US7917145B2 (en) * 1992-11-02 2011-03-29 Broadcom Corporation Radio frequency local area network
US6385312B1 (en) 1993-02-22 2002-05-07 Murex Securities, Ltd. Automatic routing and information system for telephonic services
US6868270B2 (en) 1994-01-11 2005-03-15 Telefonaktiebolaget L.M. Ericsson Dual-mode methods, systems, and terminals providing reduced mobile terminal registrations
US6195555B1 (en) * 1994-01-11 2001-02-27 Ericsson Inc. Method of directing a call to a mobile telephone in a dual mode cellular satellite communication network
US5669061A (en) * 1994-08-19 1997-09-16 Trimble Navigation Limited Automatic cellular phone tracking
US6038444A (en) * 1994-08-19 2000-03-14 Trimble Navigation Limited Method and apparatus for advising cellphone users of possible actions to avoid dropped calls
US5659601A (en) * 1995-05-09 1997-08-19 Motorola, Inc. Method of selecting a cost effective service plan
US6044265A (en) * 1995-06-05 2000-03-28 Bellsouth Corporation Methods and apparatus for cellular set programming
US5903618A (en) * 1995-07-18 1999-05-11 Casio Computer Co., Ltd. Multimode radio communication system
US5831545A (en) * 1995-08-25 1998-11-03 Motorola, Inc. Method and apparatus for adjusting a communication strategy in a radio communication system using location
SE9504158L (en) * 1995-11-22 1996-12-16 Taxitorget Bestaellningscentra Telecommunication system for routing calls to mobile subscribers via telephone exchange
US5794151A (en) * 1995-12-22 1998-08-11 Motorola, Inc. Frequency allocation for shared spectrum transmitter based on location
US5918180A (en) * 1995-12-22 1999-06-29 Dimino; Michael Telephone operable global tracking system for vehicles
US5862480A (en) * 1995-12-26 1999-01-19 Motorola, Inc. Method and apparatus for managing service accessibility between differing radio telecommunication networks
US6097802A (en) 1996-02-28 2000-08-01 Sbc Technology Resources, Inc. Advanced intelligent single telephone number routing
US6519463B2 (en) 1996-02-28 2003-02-11 Tendler Cellular, Inc. Location based service request system
EP0800319A1 (en) * 1996-04-02 1997-10-08 Hewlett-Packard Company Locating method for mobile radio systems
US5806005A (en) * 1996-05-10 1998-09-08 Ricoh Company, Ltd. Wireless image transfer from a digital still video camera to a networked computer
US5901214A (en) 1996-06-10 1999-05-04 Murex Securities, Ltd. One number intelligent call processing system
US6236365B1 (en) 1996-09-09 2001-05-22 Tracbeam, Llc Location of a mobile station using a plurality of commercial wireless infrastructures
US7903029B2 (en) 1996-09-09 2011-03-08 Tracbeam Llc Wireless location routing applications and architecture therefor
GB2337386B (en) 1996-09-09 2001-04-04 Dennis J Dupray Location of a mobile station
US7714778B2 (en) 1997-08-20 2010-05-11 Tracbeam Llc Wireless location gateway and applications therefor
US9134398B2 (en) 1996-09-09 2015-09-15 Tracbeam Llc Wireless location using network centric location estimators
US5864764A (en) * 1996-11-25 1999-01-26 Motorola, Inc. Infrastructure transceiver and method for configuration based on location information
JP2853688B2 (en) * 1996-12-26 1999-02-03 日本電気株式会社 Mobility management method for personal communication system
US5983109A (en) 1997-02-03 1999-11-09 Northern Telecom Limited Method and apparatus for using advanced positioning systems in cellular communications networks
US6055434A (en) * 1997-02-11 2000-04-25 Ericsson Inc. Method and system for locating a mobile station within a mobile telecommunications network
US6154656A (en) * 1997-02-27 2000-11-28 Ericsson Inc. Wireless communication device and system incorporating location-determining means
US6850600B1 (en) * 1997-03-31 2005-02-01 Sbc Laboratories, Inc. Apparatus and method for intelligent call routing and call return
WO1998053573A2 (en) * 1997-05-19 1998-11-26 Integrated Data Communications, Inc. System and method to communicate time stamped, 3-axis geo-position data within telecommunication networks
US5930713A (en) * 1997-05-28 1999-07-27 Telefonaktiebolaget L M Ericsson (Publ) Proactive communication of mobile station position information following inter-exchange handoff
FI112900B (en) 1997-06-17 2004-01-30 Sonera Oyj Pricing method in mobile system
WO1999009701A2 (en) * 1997-08-18 1999-02-25 Siemens Aktiengesellschaft Data transfer method and device
FI973663A (en) * 1997-09-11 1999-03-12 Nokia Telecommunications Oy Mobile Phone System
US6016322A (en) * 1997-09-22 2000-01-18 Kor Electronics, Inc. Apparatus and method for self synchronization in a digital data wireless communication system
US6531982B1 (en) 1997-09-30 2003-03-11 Sirf Technology, Inc. Field unit for use in a GPS system
US6073012A (en) * 1997-10-04 2000-06-06 Motorola, Inc. System for defining an individual subscriber unit location within a wireless communication system and method therefor
US6085098A (en) * 1997-10-22 2000-07-04 Ericsson Inc. Apparatus and method for automatically configuring settings of a software application in a portable intelligent communications device
US6330324B1 (en) * 1997-12-09 2001-12-11 Sbc Technology Resources, Inc. Geographical call routing for a non-emergency calling service
US6310944B1 (en) 1997-12-17 2001-10-30 Nortel Networks Limited Method for adding context to communications
US6647257B2 (en) * 1998-01-21 2003-11-11 Leap Wireless International, Inc. System and method for providing targeted messages based on wireless mobile location
US6327471B1 (en) * 1998-02-19 2001-12-04 Conexant Systems, Inc. Method and an apparatus for positioning system assisted cellular radiotelephone handoff and dropoff
CA2321918C (en) * 1998-03-11 2008-07-08 Swisscom Ag Routing method for wireless and distributed systems
US6348744B1 (en) 1998-04-14 2002-02-19 Conexant Systems, Inc. Integrated power management module
US6421009B2 (en) 1998-05-08 2002-07-16 Peter Suprunov Mobile station position tracking system for public safety
US5982324A (en) * 1998-05-14 1999-11-09 Nortel Networks Corporation Combining GPS with TOA/TDOA of cellular signals to locate terminal
US6249245B1 (en) * 1998-05-14 2001-06-19 Nortel Networks Limited GPS and cellular system interworking
US6236359B1 (en) 1998-05-14 2001-05-22 Nortel Networks Limited Cellular terminal location using GPS signals in the cellular band
DE19831086C2 (en) 1998-07-10 2001-10-18 Ericsson Telefon Ab L M Telecommunication system
EP1099354B8 (en) 1998-07-20 2013-06-26 Unwired Planet, LLC Subscriber dependent location-based services
US6813346B2 (en) * 1998-08-10 2004-11-02 Sbc Properties, L.P. System and method for selecting a destination number upon receiving a dialed number from a calling party
US7545854B1 (en) 1998-09-01 2009-06-09 Sirf Technology, Inc. Doppler corrected spread spectrum matched filter
US7711038B1 (en) 1998-09-01 2010-05-04 Sirf Technology, Inc. System and method for despreading in a spread spectrum matched filter
US6693953B2 (en) 1998-09-30 2004-02-17 Skyworks Solutions, Inc. Adaptive wireless communication receiver
US6366780B1 (en) 1998-10-08 2002-04-02 Nortel Networks Ltd. Real-time spectrum usage data collection in a wireless communication system
US6504634B1 (en) 1998-10-27 2003-01-07 Air Fiber, Inc. System and method for improved pointing accuracy
JP2002529004A (en) * 1998-10-27 2002-09-03 エア ファイバー インコーポレイテッド System and method for integrating network nodes
US6321092B1 (en) * 1998-11-03 2001-11-20 Signal Soft Corporation Multiple input data management for wireless location-based applications
US6321090B1 (en) * 1998-11-06 2001-11-20 Samir S. Soliman Mobile communication system with position detection to facilitate hard handoff
US8135413B2 (en) 1998-11-24 2012-03-13 Tracbeam Llc Platform and applications for wireless location and other complex services
GB9828827D0 (en) * 1998-12-30 1999-02-17 Nokia Telecommunications Oy Telecommunication system and method
US7966078B2 (en) 1999-02-01 2011-06-21 Steven Hoffberg Network media appliance system and method
US6606349B1 (en) 1999-02-04 2003-08-12 Sirf Technology, Inc. Spread spectrum receiver performance improvement
US6448925B1 (en) 1999-02-04 2002-09-10 Conexant Systems, Inc. Jamming detection and blanking for GPS receivers
EP1326456B1 (en) * 1999-03-26 2011-05-04 Swisscom AG Method for determining the duration of processes to be charged
WO2001003072A1 (en) 1999-07-06 2001-01-11 Swisscom Mobile Ag Method for checking user authorization
US6304216B1 (en) 1999-03-30 2001-10-16 Conexant Systems, Inc. Signal detector employing correlation analysis of non-uniform and disjoint sample segments
US6577271B1 (en) 1999-03-30 2003-06-10 Sirf Technology, Inc Signal detector employing coherent integration
AU3929699A (en) * 1999-04-30 2000-11-17 Nokia Networks Oy Method and device for performing handover using location information
US6351486B1 (en) 1999-05-25 2002-02-26 Conexant Systems, Inc. Accelerated selection of a base station in a wireless communication system
US6091959A (en) * 1999-06-02 2000-07-18 Motorola, Inc. Method and apparatus in a two-way wireless communication system for location-based message transmission
JP2001103537A (en) * 1999-07-29 2001-04-13 Ntt Docomo Inc Positional information notice method and system
US6539230B2 (en) 1999-08-19 2003-03-25 Lucent Technologies Inc. Dynamic maintenance of location dependent operating parameters in a wireless terminal
JP2001069384A (en) * 1999-08-25 2001-03-16 Olympus Optical Co Ltd Electronic camera system
CA2316440A1 (en) * 1999-08-31 2001-02-28 Lucent Technologies Inc. System for performing handoffs using location information for a wireless unit
KR100330221B1 (en) * 1999-09-13 2002-03-25 윤종용 Apparatus and method for constructing a zone data base for homezone service
AU1367101A (en) 1999-09-24 2002-01-08 Dennis J. Dupray Geographically constrained network services
US6594043B1 (en) 1999-12-28 2003-07-15 Air Fiber, Inc. System and method for providing an eye safe laser communication system
US6711408B1 (en) * 2000-02-05 2004-03-23 Ericsson Inc. Position assisted handoff within a wireless communications network
US6611688B1 (en) * 2000-02-22 2003-08-26 Ericsson Inc. Position reporting method for a mobile terminal in a mobile communication network
US6952440B1 (en) 2000-04-18 2005-10-04 Sirf Technology, Inc. Signal detector employing a Doppler phase correction system
US6788655B1 (en) 2000-04-18 2004-09-07 Sirf Technology, Inc. Personal communications device with ratio counter
US6714158B1 (en) 2000-04-18 2004-03-30 Sirf Technology, Inc. Method and system for data detection in a global positioning system satellite receiver
US6931055B1 (en) 2000-04-18 2005-08-16 Sirf Technology, Inc. Signal detector employing a doppler phase correction system
US7885314B1 (en) 2000-05-02 2011-02-08 Kenneth Scott Walley Cancellation system and method for a wireless positioning system
AUPQ724600A0 (en) * 2000-05-02 2000-05-25 Rojone Pty Limited Personal monitoring system
AU6466701A (en) * 2000-05-16 2001-11-26 Air Fiber Inc Optical transceiver design and mechanical features
US7949362B2 (en) * 2000-05-18 2011-05-24 Sirf Technology, Inc. Satellite positioning aided communication system selection
US7970411B2 (en) 2000-05-18 2011-06-28 Sirf Technology, Inc. Aided location communication system
US6778136B2 (en) 2001-12-13 2004-08-17 Sirf Technology, Inc. Fast acquisition of GPS signal
US8078189B2 (en) * 2000-08-14 2011-12-13 Sirf Technology, Inc. System and method for providing location based services over a network
AU2001261721A1 (en) 2000-05-19 2001-12-03 Leap Wireless International, Inc. Computer network page advertising method
US10641861B2 (en) 2000-06-02 2020-05-05 Dennis J. Dupray Services and applications for a communications network
US10684350B2 (en) 2000-06-02 2020-06-16 Tracbeam Llc Services and applications for a communications network
US9875492B2 (en) 2001-05-22 2018-01-23 Dennis J. Dupray Real estate transaction system
US6834164B1 (en) 2000-06-07 2004-12-21 Douglas Wilson Companies Alignment of an optical transceiver for a free-space optical communication system
US6716101B1 (en) * 2000-06-28 2004-04-06 Bellsouth Intellectual Property Corporation System and method for monitoring the location of individuals via the world wide web using a wireless communications network
US20030009345A1 (en) * 2000-07-17 2003-01-09 Thorpe Kenneth J. System and method for communication and processing of legal document based on geographic area
FR2814242B1 (en) * 2000-09-19 2002-12-20 France Telecom DEVICE FOR PUNCTUAL MEASUREMENT OF A MAGNETIC FIELD RADIOFREQUENCY OF CONSTANT AMPLITUDE AND FREQUENCY
US7079551B2 (en) * 2000-10-05 2006-07-18 Kiribati Wireless Ventures, Llc Private network link verification procedure in free space optical communication network
US20020071160A1 (en) * 2000-10-16 2002-06-13 Andrew Pavelchek Establishment and maintenance of optical links between optical transceiver nodes in free-space optical communications networks
US8082096B2 (en) 2001-05-22 2011-12-20 Tracbeam Llc Wireless location routing applications and architecture therefor
AUPR541701A0 (en) * 2001-06-01 2001-06-28 Kazamias, Christian Intelligent voice and data dialing service using electronic application, novel portable media and m-commerce system
US20030013449A1 (en) * 2001-07-11 2003-01-16 Hose David A. Monitoring boundary crossings in a wireless network
US8918073B2 (en) 2002-03-28 2014-12-23 Telecommunication Systems, Inc. Wireless telecommunications location based services scheme selection
US8126889B2 (en) 2002-03-28 2012-02-28 Telecommunication Systems, Inc. Location fidelity adjustment based on mobile subscriber privacy profile
US7426380B2 (en) 2002-03-28 2008-09-16 Telecommunication Systems, Inc. Location derived presence information
US8290505B2 (en) 2006-08-29 2012-10-16 Telecommunications Systems, Inc. Consequential location derived information
US20040203854A1 (en) * 2002-04-26 2004-10-14 Nowak Steven P. Formatting location information based on output device specifications
FR2840076B1 (en) * 2002-05-21 2006-04-28 Sin Etke Technology Co Ltd SYSTEM AND METHOD FOR A GPS COMMUNICATION FUNCTION CONTROL SYSTEM
JP3912509B2 (en) * 2002-06-24 2007-05-09 日本電気株式会社 Mobile communication system, radio switching method, mobile base station, and portable terminal
US8666397B2 (en) 2002-12-13 2014-03-04 Telecommunication Systems, Inc. Area event handling when current network does not cover target area
EP1447678A1 (en) * 2003-02-15 2004-08-18 Alcatel A method of determining a quality measure of a position measurement method for a cellular telecommunication network
US7567810B1 (en) * 2003-09-30 2009-07-28 Sprint Spectrum L.P. Method and system for delivering data based on context
US7260186B2 (en) 2004-03-23 2007-08-21 Telecommunication Systems, Inc. Solutions for voice over internet protocol (VoIP) 911 location services
US20080126535A1 (en) 2006-11-28 2008-05-29 Yinjun Zhu User plane location services over session initiation protocol (SIP)
US20080090546A1 (en) 2006-10-17 2008-04-17 Richard Dickinson Enhanced E911 network access for a call center using session initiation protocol (SIP) messaging
US20050209762A1 (en) * 2004-03-18 2005-09-22 Ford Global Technologies, Llc Method and apparatus for controlling a vehicle using an object detection system and brake-steer
US7113128B1 (en) 2004-10-15 2006-09-26 Telecommunication Systems, Inc. Culled satellite ephemeris information for quick, accurate assisted locating satellite location determination for cell site antennas
US7411546B2 (en) * 2004-10-15 2008-08-12 Telecommunication Systems, Inc. Other cell sites used as reference point to cull satellite ephemeris information for quick, accurate assisted locating satellite location determination
US6985105B1 (en) 2004-10-15 2006-01-10 Telecommunication Systems, Inc. Culled satellite ephemeris information based on limiting a span of an inverted cone for locating satellite in-range determinations
US7629926B2 (en) 2004-10-15 2009-12-08 Telecommunication Systems, Inc. Culled satellite ephemeris information for quick, accurate assisted locating satellite location determination for cell site antennas
US7353034B2 (en) 2005-04-04 2008-04-01 X One, Inc. Location sharing and tracking using mobile phones or other wireless devices
US8660573B2 (en) 2005-07-19 2014-02-25 Telecommunications Systems, Inc. Location service requests throttling
US7330122B2 (en) 2005-08-10 2008-02-12 Remotemdx, Inc. Remote tracking and communication device
US9282451B2 (en) 2005-09-26 2016-03-08 Telecommunication Systems, Inc. Automatic location identification (ALI) service requests steering, connection sharing and protocol translation
US7825780B2 (en) 2005-10-05 2010-11-02 Telecommunication Systems, Inc. Cellular augmented vehicle alarm notification together with location services for position of an alarming vehicle
US7907551B2 (en) 2005-10-06 2011-03-15 Telecommunication Systems, Inc. Voice over internet protocol (VoIP) location based 911 conferencing
US7626951B2 (en) 2005-10-06 2009-12-01 Telecommunication Systems, Inc. Voice Over Internet Protocol (VoIP) location based conferencing
US8467320B2 (en) 2005-10-06 2013-06-18 Telecommunication Systems, Inc. Voice over internet protocol (VoIP) multi-user conferencing
US8150363B2 (en) 2006-02-16 2012-04-03 Telecommunication Systems, Inc. Enhanced E911 network access for call centers
US8059789B2 (en) 2006-02-24 2011-11-15 Telecommunication Systems, Inc. Automatic location identification (ALI) emergency services pseudo key (ESPK)
US7899450B2 (en) 2006-03-01 2011-03-01 Telecommunication Systems, Inc. Cellular augmented radar/laser detection using local mobile network within cellular network
US9167553B2 (en) 2006-03-01 2015-10-20 Telecommunication Systems, Inc. GeoNexus proximity detector network
US7471236B1 (en) 2006-03-01 2008-12-30 Telecommunication Systems, Inc. Cellular augmented radar/laser detector
US8208605B2 (en) 2006-05-04 2012-06-26 Telecommunication Systems, Inc. Extended efficient usage of emergency services keys
US7737841B2 (en) 2006-07-14 2010-06-15 Remotemdx Alarm and alarm management system for remote tracking devices
US7936262B2 (en) 2006-07-14 2011-05-03 Securealert, Inc. Remote tracking system with a dedicated monitoring center
US8797210B2 (en) 2006-07-14 2014-08-05 Securealert, Inc. Remote tracking device and a system and method for two-way voice communication between the device and a monitoring center
WO2008057477A2 (en) 2006-11-03 2008-05-15 Telecommunication Systems, Inc. Roaming gateway enabling location based services (lbs) roaming for user plane in cdma networks without requiring use of a mobile positioning center (mpc)
US8050386B2 (en) 2007-02-12 2011-11-01 Telecommunication Systems, Inc. Mobile automatic location identification (ALI) for first responders
US9130963B2 (en) 2011-04-06 2015-09-08 Telecommunication Systems, Inc. Ancillary data support in session initiation protocol (SIP) messaging
US7929530B2 (en) 2007-11-30 2011-04-19 Telecommunication Systems, Inc. Ancillary data support in session initiation protocol (SIP) messaging
MX2010009680A (en) 2008-03-07 2011-02-23 Securealert Inc A system and method for monitoring individuals using a beacon and intelligent remote tracking device.
JP4901800B2 (en) * 2008-04-14 2012-03-21 株式会社日立製作所 Wireless terminal, base station control station, and handoff control method in wireless communication system
US8612271B2 (en) 2008-10-02 2013-12-17 Certusview Technologies, Llc Methods and apparatus for analyzing locate and marking operations with respect to environmental landmarks
US8068587B2 (en) 2008-08-22 2011-11-29 Telecommunication Systems, Inc. Nationwide table routing of voice over internet protocol (VOIP) emergency calls
WO2010044837A1 (en) * 2008-10-14 2010-04-22 Telecommunication Systems, Inc. Location based proximity alert
US8892128B2 (en) 2008-10-14 2014-11-18 Telecommunication Systems, Inc. Location based geo-reminders
CA2692110C (en) * 2009-02-11 2015-10-27 Certusview Technologies, Llc Providing a process guide to a locate technician
CA2897462A1 (en) 2009-02-11 2010-05-04 Certusview Technologies, Llc Management system, and associated methods and apparatus, for providing automatic assessment of a locate operation
US9301191B2 (en) 2013-09-20 2016-03-29 Telecommunication Systems, Inc. Quality of service to over the top applications used with VPN
CA2706195A1 (en) 2009-06-25 2010-09-01 Certusview Technologies, Llc Methods and apparatus for assessing locate request tickets
US8750824B2 (en) * 2009-10-30 2014-06-10 International Business Machines Corporation Global mobility infrastructure for user devices
US8252204B2 (en) * 2009-12-18 2012-08-28 E I Du Pont De Nemours And Company Glass compositions used in conductors for photovoltaic cells
US8514070B2 (en) 2010-04-07 2013-08-20 Securealert, Inc. Tracking device incorporating enhanced security mounting strap
US8336664B2 (en) 2010-07-09 2012-12-25 Telecommunication Systems, Inc. Telematics basic mobile device safety interlock
WO2012005769A1 (en) 2010-07-09 2012-01-12 Telecommunication Systems, Inc. Location privacy selector
US8560410B2 (en) * 2010-08-13 2013-10-15 T-Mobile Usa, Inc. Mapping a mobile device location to billing regions in internet protocol multimedia subsystems
US9538493B2 (en) 2010-08-23 2017-01-03 Finetrak, Llc Locating a mobile station and applications therefor
US8965447B1 (en) 2010-08-24 2015-02-24 Cellco Partnership Location based network selection
US8738071B2 (en) 2010-12-02 2014-05-27 Cellco Partnership Location based idle mobile frequency selection
US8688087B2 (en) 2010-12-17 2014-04-01 Telecommunication Systems, Inc. N-dimensional affinity confluencer
US8942743B2 (en) 2010-12-17 2015-01-27 Telecommunication Systems, Inc. iALERT enhanced alert manager
US8712468B1 (en) 2011-01-20 2014-04-29 Cellco Partnership Mobile device mode control based on dual mapping of availability (presence) information
WO2012141762A1 (en) 2011-02-25 2012-10-18 Telecommunication Systems, Inc. Mobile internet protocol (ip) location
US8649806B2 (en) 2011-09-02 2014-02-11 Telecommunication Systems, Inc. Aggregate location dynometer (ALD)
US9479344B2 (en) 2011-09-16 2016-10-25 Telecommunication Systems, Inc. Anonymous voice conversation
US8831556B2 (en) 2011-09-30 2014-09-09 Telecommunication Systems, Inc. Unique global identifier header for minimizing prank emergency 911 calls
US8738042B2 (en) 2011-10-12 2014-05-27 Qualcomm Incorporated Methods, systems, and devices for determining a closest base station to a multi-mode mobile device
US9313637B2 (en) 2011-12-05 2016-04-12 Telecommunication Systems, Inc. Wireless emergency caller profile data delivery over a legacy interface
US8984591B2 (en) 2011-12-16 2015-03-17 Telecommunications Systems, Inc. Authentication via motion of wireless device movement
US9384339B2 (en) 2012-01-13 2016-07-05 Telecommunication Systems, Inc. Authenticating cloud computing enabling secure services
US8688174B2 (en) 2012-03-13 2014-04-01 Telecommunication Systems, Inc. Integrated, detachable ear bud device for a wireless phone
US9307372B2 (en) 2012-03-26 2016-04-05 Telecommunication Systems, Inc. No responders online
US9544260B2 (en) 2012-03-26 2017-01-10 Telecommunication Systems, Inc. Rapid assignment dynamic ownership queue
US9338153B2 (en) 2012-04-11 2016-05-10 Telecommunication Systems, Inc. Secure distribution of non-privileged authentication credentials
US9313638B2 (en) 2012-08-15 2016-04-12 Telecommunication Systems, Inc. Device independent caller data access for emergency calls
US9208346B2 (en) 2012-09-05 2015-12-08 Telecommunication Systems, Inc. Persona-notitia intellection codifier
US9456301B2 (en) 2012-12-11 2016-09-27 Telecommunication Systems, Inc. Efficient prisoner tracking
US8983047B2 (en) 2013-03-20 2015-03-17 Telecommunication Systems, Inc. Index of suspicion determination for communications request
US9408034B2 (en) 2013-09-09 2016-08-02 Telecommunication Systems, Inc. Extended area event for network based proximity discovery
US9516104B2 (en) 2013-09-11 2016-12-06 Telecommunication Systems, Inc. Intelligent load balancer enhanced routing
US9479897B2 (en) 2013-10-03 2016-10-25 Telecommunication Systems, Inc. SUPL-WiFi access point controller location based services for WiFi enabled mobile devices

Citations (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3662267A (en) * 1970-05-20 1972-05-09 Sylvania Electric Prod System for locating and communicating with mobile units
US4144411A (en) * 1976-09-22 1979-03-13 Bell Telephone Laboratories, Incorporated Cellular radiotelephone system structured for flexible use of different cell sizes
US4161734A (en) * 1977-10-17 1979-07-17 General Electric Company Position surveillance using one active ranging satellite and time of arrival of a signal from an independent satellite
US4545071A (en) * 1982-11-12 1985-10-01 Motorola, Inc. Portable radio for a zoned data communications system communicating message signals between portable radios and a host computer
US4700374A (en) * 1984-07-06 1987-10-13 Alcatel N.V. Mobile telephone location system
US4724538A (en) * 1985-09-06 1988-02-09 Comstock Group, Inc. Emergency roadside telephone communications system
US4799062A (en) * 1987-04-27 1989-01-17 Axonn Corporation Radio position determination method and apparatus
US4812852A (en) * 1987-02-20 1989-03-14 Scientific Development Corporation Locating system and method
US4888593A (en) * 1987-12-15 1989-12-19 Signal Science, Inc. Time difference of arrival geolocation method, etc.
US4939522A (en) * 1989-05-15 1990-07-03 Bechtel Group, Inc. Method and system for monitoring vehicle location
US5223844A (en) * 1992-04-17 1993-06-29 Auto-Trac, Inc. Vehicle tracking and security system
US5299132A (en) * 1991-01-17 1994-03-29 By-Word Technologies, Inc. Vehicle locating and communicating method and apparatus using cellular telephone network
US5303297A (en) * 1991-07-25 1994-04-12 Motorola, Inc. Dynamic pricing method and apparatus for communication systems
US5311197A (en) * 1993-02-01 1994-05-10 Trimble Navigation Limited Event-activated reporting of vehicle location
US5317323A (en) * 1993-03-05 1994-05-31 E-Systems, Inc. Passive high accuracy geolocation system and method
US5319374A (en) * 1993-02-02 1994-06-07 Trimble Navigation Limited Precise universal time for vehicles
US5327144A (en) * 1993-05-07 1994-07-05 Associated Rt, Inc. Cellular telephone location system
US5343512A (en) * 1992-03-27 1994-08-30 Motorola, Inc. Call setup method for use with a network having mobile end users
US5365450A (en) * 1992-12-17 1994-11-15 Stanford Telecommunications, Inc. Hybrid GPS/data line unit for rapid, precise, and robust position determination
US5365451A (en) * 1991-12-09 1994-11-15 Motorola, Inc. Mobile unit tracking system
US5365516A (en) * 1991-08-16 1994-11-15 Pinpoint Communications, Inc. Communication system and method for determining the location of a transponder unit
US5382958A (en) * 1992-12-17 1995-01-17 Motorola, Inc. Time transfer position location method and apparatus
US5390124A (en) * 1992-12-01 1995-02-14 Caterpillar Inc. Method and apparatus for improving the accuracy of position estimates in a satellite based navigation system
US5390125A (en) * 1990-02-05 1995-02-14 Caterpillar Inc. Vehicle position determination system and method
US5390339A (en) * 1991-10-23 1995-02-14 Motorola Inc. Method and apparatus for selecting a serving transceiver
US5418537A (en) * 1992-11-18 1995-05-23 Trimble Navigation, Ltd. Location of missing vehicles
US5430656A (en) * 1992-09-08 1995-07-04 Dekel; Itzhak Mobile communications system
US5452211A (en) * 1992-08-10 1995-09-19 Caterpillar Inc. Method and system for determining vehicle position

Family Cites Families (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR398773A (en) * 1908-04-06 1909-06-14 Eunice Packer Device for tracing on fabrics, etc.
US4177466A (en) * 1977-11-16 1979-12-04 Lo-Jack Corporation Auto theft detection system
US4233473A (en) * 1978-08-31 1980-11-11 Frost Edward G Comprehensive automatic mobile radio telephone system
US4232317A (en) * 1978-11-01 1980-11-04 Freeny Jr Charles C Quantized hyperbolic and inverse hyperbolic object location system
US4229620A (en) * 1978-11-09 1980-10-21 Bell Telephone Laboratories, Incorporated Mobile radiotelephone station two-way ranging system
DE3672376D1 (en) * 1985-04-17 1990-08-09 Siemens Ag MOBILE RADIO SYSTEM.
US4788711A (en) * 1985-11-25 1988-11-29 Cellular Communications Corporation Apparatus and method for a cellular freeway emergency telephone service
US4818998A (en) * 1986-03-31 1989-04-04 Lo-Jack Corporation Method of and system and apparatus for locating and/or tracking stolen or missing vehicles and the like
US4908629A (en) * 1986-03-31 1990-03-13 Lo-Jack Corporation Apparatus for locating and/or tracking stolen or missing vehicles and the like
US5177604A (en) * 1986-05-14 1993-01-05 Radio Telcom & Technology, Inc. Interactive television and data transmission system
EP0292182B1 (en) * 1987-05-15 1996-07-24 Securicor Datatrak Limited Mobile transmitter/receiver
US5086452A (en) * 1988-06-13 1992-02-04 Kabushiki Kaisha Toshiba Radio telephone system and its control method
US4977399A (en) * 1988-08-09 1990-12-11 At&E Corporation Mobile radio paging test system
US4914651A (en) * 1988-09-20 1990-04-03 Cellular Data, Inc. Cellular data system
IL91529A0 (en) * 1988-10-28 1990-04-29 Motorola Inc Satellite cellular telephone and data communication system
JPH02210923A (en) * 1989-02-09 1990-08-22 Sharp Corp Travelling object communication system
US4972456A (en) * 1989-02-10 1990-11-20 Gte Mobilnet Incorporated Rural radiotelephone system
US5081667A (en) * 1989-05-01 1992-01-14 Clifford Electronics, Inc. System for integrating a cellular telephone with a vehicle security system
US5187805A (en) * 1989-10-02 1993-02-16 Motorola, Inc. Telemetry, tracking and control for satellite cellular communication systems
US5056109A (en) * 1989-11-07 1991-10-08 Qualcomm, Inc. Method and apparatus for controlling transmission power in a cdma cellular mobile telephone system
US5214789A (en) * 1989-11-17 1993-05-25 Uniden America Corporation Radio channel allocation based on location of mobile users
US5054110A (en) * 1989-12-29 1991-10-01 Motorola, Inc. Multi-site dispatching system cell registration
US5093925A (en) * 1990-04-25 1992-03-03 Motorola, Inc. Three dimensional cellular communication system with coordinate offset and frequency reuse
JP2614348B2 (en) * 1990-06-04 1997-05-28 株式会社デンソー Steering angle detector
US5103459B1 (en) * 1990-06-25 1999-07-06 Qualcomm Inc System and method for generating signal waveforms in a cdma cellular telephone system
US5081703A (en) * 1990-06-27 1992-01-14 Pactel Corporation Satellite mobile communication system for rural service areas
FR2664400A1 (en) * 1990-07-04 1992-01-10 Kodak Pathe INVERSIBLE PRODUCT FOR COLOR PHOTOGRAPHY.
US5043736B1 (en) * 1990-07-27 1994-09-06 Cae Link Corp Cellular position location system
US5170490A (en) * 1990-09-28 1992-12-08 Motorola, Inc. Radio functions due to voice compression
US5218716A (en) * 1990-11-05 1993-06-08 Motorola, Inc. Method for locating a communication unit within a multi mode communication system
US5222249A (en) * 1990-11-08 1993-06-22 Motorola, Inc. Dynamic rf communication resource access by roving mobile units
US5315636A (en) * 1991-06-28 1994-05-24 Network Access Corporation Personal telecommunications system
CA2066538C (en) * 1991-07-09 1997-12-23 Brian David Bolliger Mobile-telephone system call processing arrangement
US5227802A (en) * 1991-12-23 1993-07-13 Motorola, Inc. Satellite system cell management
US5235633A (en) * 1991-12-26 1993-08-10 Everett Dennison Cellular telephone system that uses position of a mobile unit to make call management decisions
US5334974A (en) * 1992-02-06 1994-08-02 Simms James R Personal security system
US5392287A (en) * 1992-03-05 1995-02-21 Qualcomm Incorporated Apparatus and method for reducing power consumption in a mobile communications receiver
US5361399A (en) * 1992-06-02 1994-11-01 Pagemart, Inc. Adaptive communication system for transmitting between base stations and portable transceivers via different data rate communication links
US5260968A (en) * 1992-06-23 1993-11-09 The Regents Of The University Of California Method and apparatus for multiplexing communications signals through blind adaptive spatial filtering
US5396540A (en) * 1992-07-23 1995-03-07 Rockwell International Corporation Remote vehicle communications system and method
US5375140A (en) * 1992-11-24 1994-12-20 Stanford Telecommunications, Inc. Wireless direct sequence spread spectrum digital cellular telephone system

Patent Citations (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3662267A (en) * 1970-05-20 1972-05-09 Sylvania Electric Prod System for locating and communicating with mobile units
US4144411A (en) * 1976-09-22 1979-03-13 Bell Telephone Laboratories, Incorporated Cellular radiotelephone system structured for flexible use of different cell sizes
US4161734A (en) * 1977-10-17 1979-07-17 General Electric Company Position surveillance using one active ranging satellite and time of arrival of a signal from an independent satellite
US4545071A (en) * 1982-11-12 1985-10-01 Motorola, Inc. Portable radio for a zoned data communications system communicating message signals between portable radios and a host computer
US4700374A (en) * 1984-07-06 1987-10-13 Alcatel N.V. Mobile telephone location system
US4724538A (en) * 1985-09-06 1988-02-09 Comstock Group, Inc. Emergency roadside telephone communications system
US4812852A (en) * 1987-02-20 1989-03-14 Scientific Development Corporation Locating system and method
US4799062A (en) * 1987-04-27 1989-01-17 Axonn Corporation Radio position determination method and apparatus
US4888593A (en) * 1987-12-15 1989-12-19 Signal Science, Inc. Time difference of arrival geolocation method, etc.
US4939522A (en) * 1989-05-15 1990-07-03 Bechtel Group, Inc. Method and system for monitoring vehicle location
US5390125A (en) * 1990-02-05 1995-02-14 Caterpillar Inc. Vehicle position determination system and method
US5299132A (en) * 1991-01-17 1994-03-29 By-Word Technologies, Inc. Vehicle locating and communicating method and apparatus using cellular telephone network
US5303297A (en) * 1991-07-25 1994-04-12 Motorola, Inc. Dynamic pricing method and apparatus for communication systems
US5365516A (en) * 1991-08-16 1994-11-15 Pinpoint Communications, Inc. Communication system and method for determining the location of a transponder unit
US5390339A (en) * 1991-10-23 1995-02-14 Motorola Inc. Method and apparatus for selecting a serving transceiver
US5365451A (en) * 1991-12-09 1994-11-15 Motorola, Inc. Mobile unit tracking system
US5343512A (en) * 1992-03-27 1994-08-30 Motorola, Inc. Call setup method for use with a network having mobile end users
US5223844A (en) * 1992-04-17 1993-06-29 Auto-Trac, Inc. Vehicle tracking and security system
US5223844B1 (en) * 1992-04-17 2000-01-25 Auto Trac Inc Vehicle tracking and security system
US5452211A (en) * 1992-08-10 1995-09-19 Caterpillar Inc. Method and system for determining vehicle position
US5430656A (en) * 1992-09-08 1995-07-04 Dekel; Itzhak Mobile communications system
US5418537A (en) * 1992-11-18 1995-05-23 Trimble Navigation, Ltd. Location of missing vehicles
US5390124A (en) * 1992-12-01 1995-02-14 Caterpillar Inc. Method and apparatus for improving the accuracy of position estimates in a satellite based navigation system
US5382958A (en) * 1992-12-17 1995-01-17 Motorola, Inc. Time transfer position location method and apparatus
US5365450A (en) * 1992-12-17 1994-11-15 Stanford Telecommunications, Inc. Hybrid GPS/data line unit for rapid, precise, and robust position determination
US5311197A (en) * 1993-02-01 1994-05-10 Trimble Navigation Limited Event-activated reporting of vehicle location
US5319374A (en) * 1993-02-02 1994-06-07 Trimble Navigation Limited Precise universal time for vehicles
US5317323A (en) * 1993-03-05 1994-05-31 E-Systems, Inc. Passive high accuracy geolocation system and method
US5327144A (en) * 1993-05-07 1994-07-05 Associated Rt, Inc. Cellular telephone location system

Cited By (106)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6907255B2 (en) 1995-12-27 2005-06-14 Sony Corporation Terminal unit, position display method, information providing system, and information providing method
US7031729B2 (en) 1995-12-27 2006-04-18 Sony Corporation Terminal unit, position display method, information providing system, and information providing method
US6996405B2 (en) 1995-12-27 2006-02-07 Sony Corporation Terminal unit, position display method, information providing system, and information providing method
US20050164716A1 (en) * 1995-12-27 2005-07-28 Yoji Kawamoto Terminal unit, position display method, information providing system, and information providing method
US20010024957A1 (en) * 1995-12-27 2001-09-27 Sony Corporation Terminal unit, position display method, information providing system, and information providing method
US6314295B1 (en) * 1995-12-27 2001-11-06 Sony Corporation Terminal unit, position display method, information providing system, and information providing method
US20050164715A1 (en) * 1995-12-27 2005-07-28 Yoji Kawamoto Terminal unit, position display method, information providing system, and information providing method
US6493338B1 (en) 1997-05-19 2002-12-10 Airbiquity Inc. Multichannel in-band signaling for data communications over digital wireless telecommunications networks
US7221669B2 (en) 1997-05-19 2007-05-22 Airbiquity, Inc. Cellular telephone having improved in-band signaling for data communications over digital wireless telecommunications networks
US20020093924A1 (en) * 1997-05-19 2002-07-18 Integrated Data Communications, Inc. In-band signaling for data communications over digital wireless telecommunications networks
US20020093990A1 (en) * 1997-05-19 2002-07-18 Preston Dan A. In-band signaling for data communications over digital wireless telecommunications networks
US20020097706A1 (en) * 1997-05-19 2002-07-25 Preston Dan A. In-band signaling for data communications over digital wireless telecommunications networks
US6690681B1 (en) 1997-05-19 2004-02-10 Airbiquity Inc. In-band signaling for data communications over digital wireless telecommunications network
US7317696B2 (en) 1997-05-19 2008-01-08 Airbiquity Inc. Method for in-band signaling of data over digital wireless telecommunications networks
US7151768B2 (en) 1997-05-19 2006-12-19 Airbiquity, Inc. In-band signaling for data communications over digital wireless telecommunications networks
US20020172193A1 (en) * 1997-05-19 2002-11-21 Preston Dan A. In-band signaling for data communications over digital wireless telecommunications networks
US7747281B2 (en) 1997-05-19 2010-06-29 Airbiquity Inc. Method for in-band signaling of data over digital wireless telecommunications networks
US7206305B2 (en) 1997-05-19 2007-04-17 Airbiquity, Inc. Software code for improved in-band signaling for data communications over digital wireless telecommunications networks
US6167274A (en) * 1997-06-03 2000-12-26 At&T Wireless Svcs. Inc. Method for locating a mobile station
US8195188B2 (en) 1997-08-04 2012-06-05 Enovsys Llc Location reporting satellite paging system with optional blocking of location reporting
US8559942B2 (en) 1997-08-04 2013-10-15 Mundi Fomukong Updating a mobile device's location
US8060109B2 (en) 1997-08-04 2011-11-15 Enovsys Llc Authorized location reporting mobile communication system
US8706078B2 (en) 1997-08-04 2014-04-22 Enovsys Llc Location reporting satellite paging system with privacy feature
US6249679B1 (en) * 1997-09-30 2001-06-19 U.S. Philips Corporation Telecommunications system, location method and mobile station for such a system
US6282417B1 (en) * 1998-05-08 2001-08-28 David K. Ward Communication radio method and apparatus
US8068792B2 (en) 1998-05-19 2011-11-29 Airbiquity Inc. In-band signaling for data communications over digital wireless telecommunications networks
US6799046B1 (en) * 1998-06-10 2004-09-28 Nortel Networks Limited Method and system for locating a mobile telephone within a mobile telephone communication network
US6374113B1 (en) * 1998-09-29 2002-04-16 Avaya Technology Corp. Dynamic call coverage paths based on terminal location
US6791959B1 (en) * 1999-04-12 2004-09-14 Broadcom Corporation Method for determining when a communication device should rate shift or roam in a wireless environment
US8218507B2 (en) 1999-04-12 2012-07-10 Broadcom Corporation System for determining when a communication device should rate shift or roam in a wireless environment
US7400605B2 (en) 1999-04-12 2008-07-15 Broadcom Corporation Method for determining when a communication device should rate shift or roam in a wireless environment
US6445912B1 (en) 1999-06-23 2002-09-03 At&T Wireless Services, Inc. System and method for checking service availability
US6389287B1 (en) * 1999-07-28 2002-05-14 Motorola, Inc. Method for prioritizing a communication in a wireless communication system
US6198931B1 (en) * 1999-07-28 2001-03-06 Motorola, Inc. Method for prioritizing a communication in a wireless communication system
US8543083B2 (en) 1999-07-29 2013-09-24 Bryan Holland Locator system
US20080268875A1 (en) * 1999-07-29 2008-10-30 Bryan Holland Locator system
US8285247B2 (en) 1999-07-29 2012-10-09 Bryan Holland Locator system
US20080220794A1 (en) * 1999-07-29 2008-09-11 Bryan Holland Wireless remote location system and method
US8238934B2 (en) 1999-07-29 2012-08-07 Bryan Holland Wireless remote location system and method
US7349705B1 (en) 1999-07-29 2008-03-25 Bryan Holland Wireless remote location system and method
US9807556B2 (en) 1999-07-29 2017-10-31 Bryan Holland Locator system
US20050020242A1 (en) * 1999-07-29 2005-01-27 Bryan Holland Locator system
US7379729B2 (en) 1999-07-29 2008-05-27 Bryan Holland Locator system
US6665534B1 (en) * 1999-10-18 2003-12-16 Avaya Inc. Priority incoming call alerting system for a wireless communication system
US6654362B1 (en) 1999-11-24 2003-11-25 Lucent Technologies, Inc. Use of location in handoff in wireless communication systems
US6768909B1 (en) * 2000-02-18 2004-07-27 Ericsson, Inc. Handoff between external and internal positioning systems
US6681121B1 (en) 2000-03-21 2004-01-20 Airbiquity Inc. Circuitry for activating a modem in a cellular telephone
WO2002013562A1 (en) * 2000-08-04 2002-02-14 Siemens Aktiengesellschaft Position-dependent control of features of a communications system
CN100375565C (en) * 2000-08-04 2008-03-12 西门子公司 Poistion-dependent control of features of communications system
US6484033B2 (en) 2000-12-04 2002-11-19 Motorola, Inc. Wireless communication system for location based schedule management and method therefor
DE10103272A1 (en) * 2001-01-25 2002-08-01 Gap Ag Gsm Applikationen Und P Mobile location device has hybrid radio module that can transmit radio signals according to at least two different transmission standards acceptable to a mobile radio fixed system
US7215965B2 (en) 2001-11-01 2007-05-08 Airbiquity Inc. Facility and method for wireless transmission of location data in a voice channel of a digital wireless telecommunications network
US20030083080A1 (en) * 2001-11-01 2003-05-01 Airbiquity Inc. Facility and method for wireless transmission of data
US20070072625A1 (en) * 2001-11-01 2007-03-29 Airbiquity Inc. Remote method for wireless transmission of location data
US7509134B2 (en) 2001-11-01 2009-03-24 Airbiquity Inc. Remote method for wireless transmission of location data
US20030139183A1 (en) * 2002-01-11 2003-07-24 Nokia Corporation Method and apparatus for reducing premature termination of mobile station LCS procedure during RR operations
US8290515B2 (en) 2004-11-05 2012-10-16 Wirelesswerx International, Inc. Method and system to monitor and control devices utilizing wireless media
US8368531B2 (en) 2004-11-05 2013-02-05 Wirelesswerx International, Inc. Method and system to control movable entities
US8009037B2 (en) 2004-11-05 2011-08-30 Wirelesswerx International, Inc. Method and system to control movable entities
US8369866B2 (en) 2004-11-05 2013-02-05 Wirelesswerx International, Inc. Method and system for providing area specific messaging
US20080176539A1 (en) * 2004-11-05 2008-07-24 Wirelesswerx International, Inc. Method and system to control movable entities
US7733853B2 (en) 2005-01-31 2010-06-08 Airbiquity, Inc. Voice channel control of wireless packet data communications
US8036201B2 (en) 2005-01-31 2011-10-11 Airbiquity, Inc. Voice channel control of wireless packet data communications
US7489939B2 (en) 2005-04-13 2009-02-10 Wirelesswerx International, Inc. Method and system for providing location updates
US20060234726A1 (en) * 2005-04-13 2006-10-19 Wirelesswerx International, Inc. Method and System for Initiating and Handling an Emergency Call Utilizing Geographical Zones
US20060234727A1 (en) * 2005-04-13 2006-10-19 Wirelesswerx International, Inc. Method and System for Initiating and Handling an Emergency Call
US7684782B2 (en) 2005-04-13 2010-03-23 Wirelesswerx International, Inc. Method and system for initiating and handling an emergency call utilizing geographical zones
US20060233318A1 (en) * 2005-04-13 2006-10-19 Wirelesswerx International, Inc. Method and System for Providing Location Updates
US20060240411A1 (en) * 2005-04-20 2006-10-26 Becton, Dickinson And Company Multiplex microparticle system
US8599873B2 (en) * 2005-05-17 2013-12-03 At&T Intellectual Property Ii, L.P. Method and apparatus for routing a call to a dual mode wireless device
US20120236795A1 (en) * 2005-05-17 2012-09-20 At&T Intellectual Property Ii, L.P. Method and Apparatus for Routing a Call to a Dual Mode Wireless Device
US20100222052A1 (en) * 2005-05-17 2010-09-02 At&T Intellectual Property Ii, L.P. Method and Apparatus for Routing a Call to a Dual Mode Wireless Device
US8223794B2 (en) * 2005-05-17 2012-07-17 At&T Intellectual Property Ii, L.P. Method and apparatus for routing a call to a dual mode wireless device
US8014942B2 (en) 2005-06-15 2011-09-06 Airbiquity, Inc. Remote destination programming for vehicle navigation
US20080195306A1 (en) * 2005-06-15 2008-08-14 Airbiquity Inc. Remote destination programming for vehicle navigation
US7924934B2 (en) 2006-04-07 2011-04-12 Airbiquity, Inc. Time diversity voice channel data communications
US20080182606A1 (en) * 2007-01-31 2008-07-31 Trapeze Software Inc. System and method of communications
US9406035B2 (en) * 2007-01-31 2016-08-02 Trapeze Software Inc. System and method of communications
US8483655B2 (en) * 2007-06-08 2013-07-09 Research In Motion Limited Methods and apparatus for use in processing disconnected emergency calls and other communications involving mobile communication devices and the remote monitoring thereof
US8315203B2 (en) 2007-08-30 2012-11-20 Wirelesswerx International, Inc. Mapping in a multi-dimensional space
US20090137255A1 (en) * 2007-08-30 2009-05-28 Wirelesswerx International, Inc. Mapping in a multi-dimensional space
US8285245B2 (en) 2007-08-30 2012-10-09 Wirelesswerx International, Inc. Messaging in a multi-dimensional space
US20090138336A1 (en) * 2007-08-30 2009-05-28 Wirelesswerx International, Inc. Messaging in a multi-dimensional space
US20090132163A1 (en) * 2007-08-30 2009-05-21 Wirelesswerx International, Inc. Configuring and using multi-dimensional zones
US8428867B2 (en) 2007-08-30 2013-04-23 Wirelesswerx International, Inc. Configuring and using multi-dimensional zones
US8200186B2 (en) 2007-08-30 2012-06-12 Wirelesswerx International, Inc. Emergency control in a multi-dimensional space
US8369393B2 (en) 2007-10-20 2013-02-05 Airbiquity Inc. Wireless in-band signaling with in-vehicle systems
US7979095B2 (en) 2007-10-20 2011-07-12 Airbiquity, Inc. Wireless in-band signaling with in-vehicle systems
US7983310B2 (en) 2008-09-15 2011-07-19 Airbiquity Inc. Methods for in-band signaling through enhanced variable-rate codecs
US8594138B2 (en) 2008-09-15 2013-11-26 Airbiquity Inc. Methods for in-band signaling through enhanced variable-rate codecs
US20100130232A1 (en) * 2008-11-24 2010-05-27 International Business Machines Corporation Location Based Services with Multiple Transmission Methods
US8958827B2 (en) 2008-11-24 2015-02-17 International Business Machines Corporation Location based services with multiple transmission methods
US8634859B2 (en) 2008-11-24 2014-01-21 International Business Machines Corporation Location based services with multiple transmission methods
US8515445B2 (en) 2008-11-24 2013-08-20 International Business Machines Corporation Location based services with multiple transmission methods
US8195093B2 (en) 2009-04-27 2012-06-05 Darrin Garrett Using a bluetooth capable mobile phone to access a remote network
US8073440B2 (en) 2009-04-27 2011-12-06 Airbiquity, Inc. Automatic gain control in a personal navigation device
US20100273470A1 (en) * 2009-04-27 2010-10-28 Airbiquity Inc. Automatic gain control in a personal navigation device
US8452247B2 (en) 2009-04-27 2013-05-28 Airbiquity Inc. Automatic gain control
US8036600B2 (en) 2009-04-27 2011-10-11 Airbiquity, Inc. Using a bluetooth capable mobile phone to access a remote network
US8346227B2 (en) 2009-04-27 2013-01-01 Airbiquity Inc. Automatic gain control in a navigation device
US8418039B2 (en) 2009-08-03 2013-04-09 Airbiquity Inc. Efficient error correction scheme for data transmission in a wireless in-band signaling system
US8249865B2 (en) 2009-11-23 2012-08-21 Airbiquity Inc. Adaptive data transmission for a digital in-band modem operating over a voice channel
US8799309B2 (en) * 2009-12-16 2014-08-05 Verizon Patent And Licensing Inc. Verifying network delivery of information to a device based on physical characteristics
US20110145273A1 (en) * 2009-12-16 2011-06-16 Verizon Patent And Licensing, Inc. Verifying network delivery of information to a device based on physical characteristics
US8848825B2 (en) 2011-09-22 2014-09-30 Airbiquity Inc. Echo cancellation in wireless inband signaling modem
US8612278B1 (en) 2013-03-06 2013-12-17 Wirelesswerx International, Inc. Controlling queuing in a defined location

Also Published As

Publication number Publication date
US5546445A (en) 1996-08-13

Similar Documents

Publication Publication Date Title
US5946611A (en) Cellular telephone system that uses position of a mobile unit to make call management decisions
US5235633A (en) Cellular telephone system that uses position of a mobile unit to make call management decisions
US5815814A (en) Cellular telephone system that uses position of a mobile unit to make call management decisions
US6847822B1 (en) Cellular telephone system that uses position of a mobile unit to make call management decisions
US6424840B1 (en) Method and system for dynamic location-based zone assignment for a wireless communication network
EP0655871B1 (en) Method and apparatus for management of automatically initiated communication
US5946618A (en) Method and apparatus for performing position-based call processing in a mobile telephone system using multiple location mapping schemes
AU738951B2 (en) Method and apparatus for performing position- and preference-based service selection in a mobile telephone system
US6868270B2 (en) Dual-mode methods, systems, and terminals providing reduced mobile terminal registrations
US6400943B1 (en) Method and apparatus for using advanced positioning systems in cellular communication networks
CN1345481B (en) Location reporting satellite paging system with optional blocking of location reporting
CA2286161C (en) Determining the location of a subscriber unit in a mobile communication system
WO1994027398A1 (en) Cellular telephone system that uses position of a mobile unit to make call management decisions
US6073012A (en) System for defining an individual subscriber unit location within a wireless communication system and method therefor
US5809396A (en) Radio telecommunication network with selectable ring signal coverage
JP3428850B2 (en) Wireless communication system
CA2143776C (en) Communication network with incoming calls directed through moving cells and method for operating same
GB2369529A (en) Call screening based on subscriber location in a cellular communication system
JP2836001B2 (en) Mobile terminal location detection and registration method for orbiting satellite communication systems
EP0987839A1 (en) Call re-routing from a mobile user to a service provider
CA2240803A1 (en) Method and system in a wireless communications network for providing a geographic location of a mobile communications device to a user thereof on a substantially continuous basis

Legal Events

Date Code Title Description
STCF Information on status: patent grant

Free format text: PATENTED CASE

FPAY Fee payment

Year of fee payment: 4

AS Assignment

Owner name: SYCORD LIMITED PARTNERSHIP, NEVADA

Free format text: CORRECTIVE ASSIGNMENT TO CORRECT PATENT NUMBERS 5946445 AND 6324611 AT REEL 13887 AND FRAME 859.;ASSIGNORS:SYGNET WIRELESS, INC. AND ITS WHOLLY OWNED SUBSIDIARY, SYGNET COMMUNICATIONS, INC.;DENNISON, EVERETT;DUFFY, TIMOTHY J.;AND OTHERS;REEL/FRAME:014146/0811

Effective date: 19980605

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FEPP Fee payment procedure

Free format text: PAT HOLDER NO LONGER CLAIMS SMALL ENTITY STATUS, ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: STOL); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

REFU Refund

Free format text: REFUND - PAYMENT OF MAINTENANCE FEE, 8TH YR, SMALL ENTITY (ORIGINAL EVENT CODE: R2552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 8

AS Assignment

Owner name: EMSAT ADVANCED GEO-LOCATION TECHNOLOGY, LLC, OHIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SYCORD LIMITED PARTNERSHIP (A/K/A SYCORD LP);REEL/FRAME:019254/0455

Effective date: 20070507

AS Assignment

Owner name: SYGNET COMMUNICATIONS, INC., OHIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DENNISON, EVERETT;NASS, EDWIN L.;DUFFY, TIMOTHY J.;AND OTHERS;REEL/FRAME:022520/0389;SIGNING DATES FROM 19911221 TO 19911223

RR Request for reexamination filed

Effective date: 20090406

FPAY Fee payment

Year of fee payment: 12